GoPro Live feed Out

As I'm sure a few of you know, GoPro has added the feature of live video and audio output with the new firmware update for the Hero HD (download here: http://www.goprocamera.com/support/hdheroupdate.php). I'm really excited about this, because I always thought the biggest problem with GoPros is that they did not have a screen.

In the description, they say that you can connect to a portable video viewer. This is probably, correction, IS a very stupid question (and I did use the search bar), but what exactly is a portable video viewer? Before you reply saying that you can view video on it, I know that. I'm not that stupid. I just want to know what type of device they're talking about. I thought a portable DVD player would work, but on mine, the video/audio jacks are only for output, and the cables that come with the GoPro do not fit.

Basically my question is this: What HANDHELD device can play live video directly from the GoPro (as its recording), using only cables that ship with the GoPro, and how much would it cost?

Sorry to bump this but I just have a quick question that didn't deserve a whole new thread.

Are there any monitors that run on batteries? By that I mean either a built in battery or an external pack. I googled this and I found one that cost around $1200. I then said "what the fuck" out loud and proceed to close the window.

Thanks.

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